CN2626426Y - Cataract eyesight checking device - Google Patents
Cataract eyesight checking device Download PDFInfo
- Publication number
- CN2626426Y CN2626426Y CN 03259314 CN03259314U CN2626426Y CN 2626426 Y CN2626426 Y CN 2626426Y CN 03259314 CN03259314 CN 03259314 CN 03259314 U CN03259314 U CN 03259314U CN 2626426 Y CN2626426 Y CN 2626426Y
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- China
- Prior art keywords
- graticle
- cataract
- aperture
- panel seat
- vision tester
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Abstract
The utility model discloses a visual acuity testing instrument for cataract, in which a light source is disposed and imaged on an aperture diaphragm, and the light of the aperture diaphragm penetrate through a focusing glass and an ocular lens and then reaches pupil. The utility model adopts special aperture diaphragm system to make the light reach the ocular fundus of cataract patient, so that the function of retina and macula lutea can be correctly evaluated before operation, and the possibly reached eyesight can be forecasted after operation, then doctor can make decision whether or not to perform operation.
Description
Technical field
This utility model relates to a kind of cataract vision tester.
Background technology
Examination of visual acuity is the visual function evaluation most important component, is the most basic inspection method of estimating the visual function situation.At present; China to the examination of visual acuity of cataract patient mainly based on traditional visual acuity chart; traditional visual acuity chart eyesight measurement result is subjected to the influence of muddy degree, ametropia, corneal transparency degree, cornea rule degree of those who are investigated's refracting media bigger; for cataract patient; usually can be with retinopathy in various degree, perhaps lens extraction and the implantable artificial crystal with muddiness can not arrive satisfied level with vision restoration merely.
Summary of the invention
The purpose of this utility model is: a kind of cataract vision tester is provided, it adopts special aperture system, make light enter the optical fundus of cataract patient, before operation, retina and macula lutea portion function are made correct evaluation, and can predict the vision that may reach after the operation, be convenient to the doctor and make the decision of whether performing the operation.
The technical solution of the utility model is: a kind of cataract vision tester, be provided with light source in this somascope, the light path of light source is provided with condenser lens, imaging place of condenser lens is provided with aperture, the light of aperture is successively through arriving the emergent pupil place behind graticle that is provided with visual acuity chart and the eyepiece, graticle can move, to regulate graticle to the distance between the eyepiece.
The further technical scheme of this utility model is: a kind of cataract vision tester, be provided with light source in this somascope, the light path of light source is provided with condenser lens, imaging place of condenser lens is provided with aperture, the light of aperture is successively through arriving the emergent pupil place behind graticle that is provided with visual acuity chart and the eyepiece, graticle can move, to regulate graticle to the distance between the eyepiece; The center of described graticle is equipped with rotating shaft, is evenly equipped with four bright zones on the graticle, is furnished with E word, letter, numeral, four kinds of visual acuity charts of pattern on four bright zones.
The more detailed technical scheme of this utility model is: a kind of cataract vision tester, be provided with light source in this somascope, the light path of light source is provided with condenser lens, imaging place of condenser lens is provided with aperture, the light of aperture is successively through arriving the emergent pupil place behind graticle that is provided with visual acuity chart and the eyepiece, graticle can move, to regulate graticle to the distance between the eyepiece; The center of described graticle is equipped with rotating shaft, is evenly equipped with four bright zones on the graticle, is furnished with E word, letter, numeral, four kinds of visual acuity charts of pattern on four bright zones; The graticle that described center wears rotating shaft is installed on the graduation panel seat, be equipped with two guide posts on the graduation panel seat, the top of graticle is provided with gyroscope wheel, the below is provided with manual pulley, be wound with the revolution steel wire that passes through the graduation panel seat on gyroscope wheel and the manual pulley, wherein one revolution steel wire and graduation panel seat are fixed, also be fixed with the diopter pointer on the revolution steel wire, the diopter pointed is fixed on the diopter scale on the somascope; Be fixed with making leaf spring on the described graduation panel seat, the periphery of graticle is provided with four locating slots corresponding with visual acuity chart, and making leaf spring is pressed on steel ball in the locating slot; Be fixed with two little axles on the described graduation panel seat, be provided with vertical with guide post of little axle is with bearing on the two little axles, and two bearings is folded on the diametric(al) of guide post.
In the technique scheme, the aperture of aperture is the 0.2-1 millimeter; The focal length of eyepiece is the 75-100 millimeter.
For the structure of reasonable Arrangement somascope, dwindle the volume of somascope, this utility model is provided with 180 degree and turns to prism on the light path between aperture and the graticle, 180 degree turn to prismatical beam projecting place to be provided with lens, and the light path at eyepiece and emergent pupil place is provided with 90 degree and turns to prism.
The utility model has the advantages that:
1. this utility model adopts special aperture light path system, and light beam is very thin, enters the optical fundus of cataract patient easily, thus can make correct evaluation to retina and macula lutea portion function before the art, and the vision that can reach behind the energy predicting surgical.
2. according to the examination of visual acuity situation, in conjunction with the inspection situation of fundus camera, slit lamp microscope, the doctor just can make whether selecting the correct decision of performing the operation.
Description of drawings
The utility model will be further described below in conjunction with drawings and Examples:
Fig. 1 is a light channel structure sketch map of the present utility model;
Fig. 2 is a structural representation of the present utility model;
Fig. 3, Fig. 4 are the structural representation of graticle and graduation panel seat;
Fig. 5 is the moving structure sketch map of graticle.
Wherein: 1 light source; 2 condenser lenss; 3 apertures; 4 graticles; 5 eyepieces; 6 emergent pupil places; 7 bright zones; 8 graduation panel seats; 9 guide posts; 10 gyroscope wheels; 11 manual pulley; 12 revolution steel wires; 13 diopter pointers; 14 diopter scales; 15180 degree turn to prism; 16 lens; 1790 degree turn to prism; 18 making leaf springs; 19 locating slots; 20 steel balls; 21 little axles; 22 bearings; 23 rotating shafts.
The specific embodiment
Embodiment: as Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, a kind of cataract vision tester, be provided with light source (1) in this somascope, the light path of light source (1) is provided with condenser lens (2), imaging place of condenser lens (2) is provided with aperture (3), the aperture of aperture (3) is the 0.2-1 millimeter, the light of aperture (3) sees through the graticle (4) and eyepiece (5) back that are provided with visual acuity chart successively and arrives emergent pupil place (6), the focal length of eyepiece (5) is the 75-100 millimeter, light path between aperture (3) and the graticle (4) is provided with 180 degree and turns to prism (15), 180 degree turn to the beam projecting place of prism (15) to be provided with lens (16), the light path of eyepiece (5) and emergent pupil place (6) is provided with 90 degree and turns to prism (17), the center of graticle (4) is equipped with rotating shaft (23), be evenly equipped with four bright zones (7) on the graticle (4), be furnished with the E word on four bright zones (7), letter, numeral, four kinds of visual acuity charts of pattern, graticle (4) is installed on the graduation panel seat (8), be equipped with two guide posts (9) on the graduation panel seat (8), the two ends of graticle (4) direction of motion are provided with gyroscope wheel (10) and manual pulley (11), be wound with the revolution steel wire (12) that passes through graduation panel seat (8) on gyroscope wheel (10) and the manual pulley (11), a revolution steel wire (12) wherein is fixing with graduation panel seat (8), also be fixed with diopter pointer (13) on the revolution steel wire (12), diopter pointer (13) points to the diopter scale (14) that is fixed on the somascope, be fixed with making leaf spring (18) on the graduation panel seat (8), the periphery of graticle (4) is provided with four locating slots corresponding with visual acuity chart (19), making leaf spring (18) is pressed on steel ball (20) in the locating slot (19), be fixed with two little axles (21) on the graduation panel seat (8), little (21) and the vertical setting of guide post (9), be with bearing (22) on the two little axles (21), two bearings (22) is folded on the diametric(al) of guide post (9).
Light source (1) images in aperture (3) through condenser lens (2) and locates, light is through aperture (3) graticle (4) that evenly throws light on, the measured observes the picture of sighting target graticle (4) at eyepiece emergent pupil place (6), by the mobile graticle of manual pulley (11) (4), make the picture of graticle (4) the most clear, the minimum sighting target that the measured can differentiate is measured's vision.
Be evenly distributed with E word, letter, numeral, four kinds of visual acuity charts of pattern on the graticle of the present utility model (4), in the design of pattern visual acuity chart place two icons of measuring astigmatic pattern are arranged, decidable measured eyes have or not astigmatism, applicable per capita to child, old people, Chinese, foreign country, the scope of application is wider, and four kinds of visual acuity charts can switch easily.
This utility model adopts the method for mobile graticle (4) to carry out diopter and regulates, and by the amount of movement of graticle (4), can directly measure those who are investigated's diopter.If the focal length of eyepiece is f, then the pairing graticle amount of movement of scale 1D is f
2/ 1000.
Claims (8)
1. cataract vision tester, it is characterized in that: be provided with light source (1) in this somascope, the light path of light source (1) is provided with condenser lens (2), imaging place of condenser lens (2) is provided with aperture (3), the light of aperture (3) sees through the graticle (4) and eyepiece (5) back that are provided with visual acuity chart successively and arrives emergent pupil place (6), graticle (4) can move, to regulate graticle (4) to the distance between the eyepiece (5).
2. cataract vision tester according to claim 1, it is characterized in that: the center of described graticle (4) is equipped with rotating shaft (23), be evenly equipped with four bright zones (7) on the graticle (4), be furnished with E word, letter, numeral, four kinds of visual acuity charts of pattern on four bright zones (7).
3. cataract vision tester according to claim 1 and 2, it is characterized in that: the graticle (4) that described center wears rotating shaft (23) is installed on the graduation panel seat (8), be equipped with two guide posts (9) on the graduation panel seat (8), the two ends of graticle (4) direction of motion are provided with gyroscope wheel (1 0) and manual pulley (11), be wound with the revolution steel wire (12) that passes through graduation panel seat (8) on gyroscope wheel (10) and the manual pulley (11), a revolution steel wire (12) wherein is fixing with graduation panel seat (8), also be fixed with diopter pointer (13) on the revolution steel wire (12), diopter pointer (13) points to the diopter scale (14) that is fixed on the somascope.
4. cataract vision tester according to claim 1 and 2, it is characterized in that: the light path between described aperture (3) and the graticle (4) is provided with 180 degree and turns to prism (15), 180 degree turn to the beam projecting place of prism (15) to be provided with lens (16), and the light path of eyepiece (5) and emergent pupil place (6) is provided with 90 degree and turns to prism (17).
5. cataract vision tester according to claim 3, it is characterized in that: be fixed with making leaf spring (18) on the described graduation panel seat (8), the periphery of graticle (4) is provided with four locating slots corresponding with visual acuity chart (19), and making leaf spring (18) is pressed on steel ball (20) in the locating slot (19).
6. cataract vision tester according to claim 3, it is characterized in that: be fixed with two little axles (21) on the described graduation panel seat (8), little (21) and the vertical setting of guide post (9), be with bearing (22) on the two little axles (21), two bearings (22) is folded on the diametric(al) of guide post (9).
7. cataract vision tester according to claim 1 is characterized in that: the aperture of described aperture (3) is the 0.2-1 millimeter.
8. cataract vision tester according to claim 1 is characterized in that: the focal length of described eyepiece (5) is the 75-100 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03259314 CN2626426Y (en) | 2003-07-04 | 2003-07-04 | Cataract eyesight checking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03259314 CN2626426Y (en) | 2003-07-04 | 2003-07-04 | Cataract eyesight checking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2626426Y true CN2626426Y (en) | 2004-07-21 |
Family
ID=34254816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03259314 Expired - Fee Related CN2626426Y (en) | 2003-07-04 | 2003-07-04 | Cataract eyesight checking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2626426Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100369575C (en) * | 2005-04-26 | 2008-02-20 | 南开大学 | Optical system and detection method of transmission eyesight detecting instrument |
| CN104510440A (en) * | 2015-01-14 | 2015-04-15 | 黑龙江省医学科学院 | Simple vision test instrument |
-
2003
- 2003-07-04 CN CN 03259314 patent/CN2626426Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100369575C (en) * | 2005-04-26 | 2008-02-20 | 南开大学 | Optical system and detection method of transmission eyesight detecting instrument |
| CN104510440A (en) * | 2015-01-14 | 2015-04-15 | 黑龙江省医学科学院 | Simple vision test instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040721 Termination date: 20120704 |